Key-shift transmission

Details Key-shift transmission Key-shift transmission

1987-11-27

1988-10-25

Wright, Dirk

Machine element or mechanism

Gearing

Interchangeably locked

192 71, 192 4891, F16H 308

Patent

active

047794755

ABSTRACT:
In a transmission comprising a plurality of freely rotatable gears (11F.sub.1 -11F.sub.6) on a transmission shaft (10), each of shift keys (13) slidably disposed within the shaft is connected pivotally to a shift collar (14) using a pin (15). The collar includes a diameter-reduced cylindrical extension (18) having therein slots (18a) through which base end projections (17) of the keys extend radially outwardly of the shaft. The shift keys are biased to pivot for a selective gear-coupling operation by coned disk springs (19) which are disposed on the cylindrical extension and between the collar and the projections.
The disk springs (19) which do not require an enlargement of the outer diameter of shift collar (14) effect a large biasing force upon shift keys (13) for the gear-coupling operation. Further, the disk springs mounted on the cylindrical extension (18) do not cause, when the collar is shifted, a rubbing engagement with the shaft (10) so that a lightness of the shifting operation is assured.

REFERENCES:
patent: 2395433 (1946-02-01), Sundt
patent: 3028763 (1962-04-01), Vetsch
patent: 4702120 (1987-10-01), Okada et al.

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